of chigago



v a. L. EDDY. SELF CLEANING FILTER FOR CARBURETER INTAKES- APPLICATION FILED MAY 12. 1 919- -RENEWED MAR. 23, 192k 191 Patelited May 10, 1921 ZZZ/22727677 VRQANY r.. nm'ygor ammo,armors,irssmmnoromnmr t E unnie, or vonrcaoo, ILLINOIS.

A licatio -mammar 12, 19-19, Serial 110. 286,659,, Renewed March 2a, 1921."

To all whom z'tmay concern:

Be it known; that I,'RA*Y L. EDDY, a Oil/J}? Zen of I the United =States,r residing at; :Chlcago, county o fiCook, State of Ill1no1s," have invented a certain new and'usefnl-Improve- "ment in Self CleaningiFilters "for Carbureter-Intakes, and declare'the following to be a full, clear, andwe'xact!description, ofthe same, such-as will enable others skilled-1n the art to Which it pertains to make anduse the same, reference beingxha'dito the'accorn- It? f s pecifi cati on of Letter s'liatent',

ELM EA IN 'FI FOB crewman-1mm.

P tente May 10,1921.

Serial No. 454,901;

Referring to the drawing, 1 represents .rtheIi-ntakeend of a carburetor to-which is attached a stationary, hollow, closed cylin- V :der-or drum, 2, preferably flanged at the ends, as indicatedat 3. ::In the jcylindricalperiphery of the-member 2- are openings through WlllCll the airfisldrawn into the cars 'bureterw In the arrangement'shown, the

openings takethe form of longinarrow slots,

4, which, itog'ethenfiproduce a large. intake opening without destroying the cylindrical panying drawings, which formiga part of contour of the intake -vParallel with and this specificatio spaced, apart from the member 2. is a roller, The air drawn into Ethefcarbnreter of 'a *5, having approximatelythe samelength as 1 -moving motor vehicle is always moreorless the lrnemberg, :Aneendless belt, 6,1 of filter- I dust-laden .and, in some localities; the dust 1ter ngmaterialpasses around the drum and, "content is so great that it is practically esaround vthelirollei'; "th'e roller being slowly I sential to provide some meansf'for cleanlng perated by suitablerdriving means, 7, acthe air 'before it enters the ;engine:-'cylinders. r-tuated-jthrough "a belt; 8, or other means The most common method ofcleaning the -.:driven, from the cam shaftforuother rotaa'inisto strain it through'azfilterfbntfithe wtable part :oittheienginewto which the cari more serious the conditionf-to beirein'edie'd vburetr supplies fuel. The openings in the by the filter, the less'efficient the latter bee drum are so dispose dsthat they will be comcomes on account'oftheclogging action of pletely closed by the belt,:so that.;a1:1; i the dirt and dust whioh soon chokes'the enteringithe rcarb ure'ter"mustupass through -filter. i Lathe latter Theisurface of the stationary The object ofthe present invention isto'". drum. is made smooth so that when the produce a simple -and novel means' which roller is operated the belt willslip over, th will filter the, air takenfin by afcarbnreter "-flIfllIIL In order/to insurethat the belt will and.automaticallyclean'itselfsothat itwill not-also slip on the'roller some positive drivalways be in condition to operate efficiently ving connection" between theroller and the and without unduly checking thefiow of air I belt may be-employedi In the arrangement to the carburetor; *shown, th'e'be'lt is provided with perfora- The various features of novelty whereby my invention is characterized will herein-- after be pointed out with particularity in the claims; but, for a'full understandingof my inventionand of its objects and advantages, reference maybe had to the followmg detailed description taken. in connection with the accompanying drawing, wherein:

Figure 1 is a top plan view otan apparatus arranged 1n accordance with my in I tions,-9, adapted to receive pro'ecting pins, 10, on the roller. Ifdesired, slnce the belt will usually be made of felt or other stretchable material, it may be reinforced along the lines of perforations by means of narrowfbands, 11, of thin metal or other mechariicallystrong material.

, Thedriving means for the belt is so dosignedjthat'the belt will travel slowly duringtheoperation ofthe engine; only a sufvention, the upper run of the filtering medium, which is in the form ofan endless belt, being broken away; 7 Fig. 2'isa side elevation ofth'e mechanism shownin Fig. 1; l p I Fig; 3 is a transverse section through the ficiently rapid rate of travel being neces- 'sary'to insure that each portion of the belt, after reaching-the intake opening, is carrried beyond the latter before any clogging takes place or itse'tficiency is otherwise impaired. Then", while each portion of the carburetor intake, taken approximately on line33 ofFig.1;and Y tion, of the back pressure valve devicein the sucti n cleaner,

belt is passing from the drum to the driving roller, it'is thoroughly cleaned by re- Fig. 4 is a view on anfenlar'gediscale, partly in side elevation andpartly in secmoving therefrom the'a'ccumulated dust and other foreignmatter which was strained out ofthe airby that portion of the-belt while overlying the intake opening,

1 vices which may be employed singly or in any desired combination. Assuming that the roller, as viewed in Fig. 2, runs in the counterclockwise direction, it will be seen that the part of the belt requiring cleaning is the lower run between the drum and the roller, and that the greater portion of the foreign matter will be on or near the under surface of this portion of the belt. I. have therefore placed underneath the lower run of the belt a suitable vacuum .cleaningdevice which may consist of a suitable nozzle, 12, of well known construction connectedto a suction pipe, 13. Suction through the pipe 13 may be induced in any suitable manner, conveniently by, utilizing the exhaust of the engine. To this end, the pipe 13 may lead into the closed end of a nozzle-like part, 14., into which extends also the exhaust pipe, 15, of the engine, or a branch of such exhaust .pipe; the pipe 15 extending axially of the part '14: through the closed end thereof and terminating at a point lying a considerable distance within the open end ofthe member 14. With this construction, when the engine is in operation, a strong suction is produced in the y pipe 13, and the dirt is collected by'the placed in position to beat the belt and thus nozzle from the belt and carried through the pipe 13 to be .finally blown out of the open end of the member 14. d

If desired, a suitable beater, 16,'may be loosen and drive off the dirt, the beater being rapidly driven through a belt, 17 or other suitable means. A still further means which may be employed for cleaning the belt consists of a pair of long brushes, 18, between which the belt passes.

In order to prevent flame or hot gases from being blown backward through the suction pipe, 13, a suitable back pressure valve device may be located in this pipe. Such a device may conveniently consist of a check valve, 19, in the pipe 13 and an outwith particularity only a single preferredform of my invention, I do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the terms employed in the definitions of my invention constituting the appended claims.

I claim:

1. The combination with the intake of a carbureter, of a filtering element, a suction cleaning device for the filtering element, an engine exhaust conduit, and a connection between said exhaust conduit and said cleaning device for producing a suction in said device. V 1

2. The combination with a stationary air intake in the form of aclosedcylinder having a perforated periphery, of an endless belt of filtering material passing over said air intake and covering the openings there in, means for moving said belt, and means acting on the belt at a point remote from the intake opening for removing therefrom the material strained out of the air. i

In testimony whereof, I sign this specification.

' RAY L, EDDY. 

